Rear diff locker adjustments

Hello

Im looking for informations on how to correctly adjust rear lock actuator in Patrol rear axle. Im switching from original vaccum actuator to pneumatic actuator on original locking mechanism but I cant find informations about it. The task now is that I bent my rear axle and Im replacing it with another one and using that oppertunity to switch from vaccum mebrain to pneumatic actuator built here in Iceland.

My Patrol is 1992 model running on 46" Mickey Tompson tires, ca 450k km on the clock, 6.2 diesel turbo (chevy), 3l gearbox and low gear made of original patrol transfer case. Im using 1:5.57 diffs. Its a grate truck.Attachment 88663